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A co-doped tio 2 Process for photocatalyst degradation of wastewater

A photocatalyst and co-doping technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, water/sewage treatment, etc., can solve the unsystematic research and doping of degradation processes Modification and other issues, to achieve the effect of improving visible light catalytic efficiency, mild preparation conditions, and low risk

Active Publication Date: 2021-07-09
深圳天泽环保科技有限公司
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Problems solved by technology

[0006] In recent years, Mao et al. used a breakthrough hydrogenation method to prepare a sheet of disordered nano-TiO 2 , TiO prepared by this method 2 The bandgap width is only 1.54eV, which has excellent visible light absorption performance and the performance of photolysis of water to produce hydrogen, but it is modified by doping and used for photocatalyst degradation of organic pollutants in water and related The degradation process has not yet been systematically studied

Method used

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  • A co-doped tio <sub>2</sub> Process for photocatalyst degradation of wastewater

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Embodiment 1

[0035] 1. Disordered nano-encapsulated TiO 2 Preparation of:

[0036] a. TiO 2 and NaBH 4 Mix and grind for 0.5h to obtain a mixture, the TiO 2 with NaBH 4 The mass ratio is 1:0.65;

[0037] b. Transfer the mixture obtained in step a into an alumina crucible, then place it in a tube furnace, raise the temperature from room temperature to 350°C at a rate of 10°C / min under a nitrogen atmosphere, and maintain it under this condition for 0.5h, and then Furnace is cooled to room temperature, obtains the powder after reaction;

[0038] c. Transfer the powder obtained in step b into an alumina crucible, then place it in a tube furnace, raise the temperature from room temperature to 400°C at a rate of 10°C / min under an argon atmosphere, and maintain it under this condition for 0.5h, then Cool to room temperature with the furnace, and wash with ethanol and water several times and dry to obtain the powder A after reaction;

[0039] d, the powder A obtained in step c is mixed with...

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Abstract

The invention discloses a treatment process for photocatalytic degradation of dye wastewater. The visible light catalyst used is disordered nano-encapsulated TiO co-doped with metal Fe and non-metal N. 2 catalyst of light. The catalyst firstly produces disordered nano-encapsulated TiO with a thin multilayer core-shell structure 2 , and then doped Fe on its surface and in the lattice and N in the lattice, the specificity of the structure and the co-doping of Fe and N elements together enhance the TiO 2 Photocatalytic degradation activity against organic dyes. The invention solves the problem of low degradation efficiency of dye wastewater in the prior art, and is suitable for degrading organic dyes in polluted water bodies.

Description

technical field [0001] The invention relates to a treatment process for photocatalytic degradation of dye wastewater, which uses disordered nano-encapsulated TiO co-doped with Fe and N 2 Photocatalyst, the photocatalyst has a special structure and Fe, N elements in TiO 2 Interlattice doping significantly enhances the TiO 2 The visible light catalytic activity of the photocatalyst has the advantages of simple operation, low cost and high degradation efficiency. Background technique [0002] In the process of textile printing and dyeing, a large number of auxiliaries that pollute the environment and are harmful to the human body are used. Most of these auxiliaries are discharged in the form of liquid, which inevitably enters the water environment and causes water pollution. For example, Rhodamine B dyes are carcinogenic and mutagenic. Wastewater containing Rhodamine B has deep chroma, high content of organic pollutants, and poor biodegradability. It is difficult to treat wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/00C02F1/30C02F1/72B01J27/24B01J35/00B01J35/02C02F101/30C02F103/30
CPCC02F1/30C02F1/725B01J27/24C02F2103/30C02F2101/308C02F2305/10B01J35/00B01J35/30B01J35/39
Inventor 卢育彬杨盛旺延海平
Owner 深圳天泽环保科技有限公司
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